Grate for furnaces



R. VAN vf:LT11g-)V519.A GRATE FOR BILER FURNCES.

190.9317294 Patented Apr. i19, 1859.

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RICHARD VAN VEL'IHOVN, OF PHILADELPHIA, PENNSYLVANIA.

GRATE FOB FURNACES.

To all whom 'it may concern:

Be it known that I, R101-IARD VAN VELT- HOVEN, of the city of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Grates for Furnaces; and I do hereby declare the following to be a full, clear, and eXact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon.

My invention consists in a hinged frame with grate bars, forming the rear of a furnace grate, in combination with certain devices described hereafter, for raising and lowering the said hinged frame, the whole being arranged substantially as hereinafter set forth so as to enable an attendant to rapidly discharge the cinders and refuse from the back of the grate into the ash pit, thereby economizing time and labor.

In order' to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

On reference to the drawing which forms a part of this specification-Figure l is an inverted sectional plan of a furnace and grate showing my improvements in the latter. Fig. 2 is a sectional elevation on the line l, 2 looking in the direction of the arrow a'. Fig. 3 is a sectional elevation on the line 3, 4L looking in the direction of the arrow y.

Similar letters refer to similar parts throughout the several views.

A represents the front, B and B the two sides, and C the back of a furnace arranged for an ordinary steam boiler.

D is the front bearer and E the back bearer for the series of stationary bars F.

G and G are two frames hinged at the points fu, fu, (Figs. 2 and 3) to the sides of the furnace and to the cross bar I-I which extends from the back of the furnace to the bearer E. Into the frames G and G are secured a series of bars I which, with the bars F form the grate of the furnace. To the underside of each of the frames G and G is secured a projecting bracket J, and immediately under the back bearer E are hinged, to the sides of the furnace and to the cross-bar H, longitudinal cams K and K bearing with their eXtreme edges at intervals against the under side of the front edge of the frames G and G each cam being furnished with a lever M to the end of which is connected a rod O projecting through the front of the furnace, where it is furnished with a suitable handle or knob 0.

To the end of the bracket J is a chain which passes over a pulley N hung to the side of the furnace and thence out in front of the latter. It will be seen that the frames G and G are so hinged to the furnace that when not retained by the cams they have a tendency to turn and assume the position shown in red lines. When the cinders and other refuse have collected on the bars of the frames G and G to an inconvenient eX- tent the attendant pulls the rod O (F ig. 2) outward causing the cam K to assume the position shown in red lines and the frame G to be released, the latter immediately turns and tilts the cinders over into the ash pit. The attendant now pulls the chain so as to restore the frame to its former position and pushes back the rod 0 thereby causing the cam K to retain the frame as before. In Fig. 3 the cam is so arranged as to require the rod O to be pushed instead of pulled, ihe result however is precisely the same as in It is usual to throw the fuel onto the bars of boiler furnaces near the front, and as it becomes consumed or partially consumed to push it back so as to make room for a new supply, the cinders or other refuse must therefore necessarily be collected at the back of the grate. When the cinders have accumulated to an inconvenient extent it has been usual heretofore to rake them out in front of the furnace, thereby disturbing the ignited fuel, and involving the necessity of much loss of time as well as much labor on the part of the attendant. The advantages, therefore, of the above described contrivance will be apparent.

I claim and desire to secure by Letters Patent- The frames G, and G, with the bars I,

In testimony whereof, I 4have signed my name to thls speelcatlon before two sub scrlblng Witnesses.

R. VAN VELTHOVEN.

HENRY HOWSON, WILLIAM E. WALTON. 

